This is Perl module JSONRPC::Transport::TCP.
INSTALLATION
JSONRPC::Transport::TCP installation is straightforward. If your CPAN shell is set up,
you should just be able to do
% cpan JSONRPC::Transport::TCP
Download it, unpack it, then build it as per the usual:
% perl Makefile.PL
% make && make test
Then install it:
% make install
DOCUMENTATION
JSONRPC::Transport::TCP documentation is available as in POD. So you can do:
% perldoc JSONRPC::Transport::TCP
to read the documentation online with your favorite pager.
Daisuke Murase